George a



G. A.-LAMB. ROTARY STEAM ENGINE.

No. 51,389. Patented Dec. 5, 1.865;

UNITED STATES GEORGE A. LAMB, OF WASHINGTON, DISTRICT OE COLUMBIA, ASSIGNOR PATENT OFFICE.

I TO HIMSELF AND SAMUEL SURBRUG.

IMPROVEMENT IN ROT RY STEAM-ENGINES.

Specification forming part of Letters Patent No. 51,35 dated December 5, 1865.

- annexed drawings, made a part of this specification, in which Figure l is a perspective view. Fig. 2 is a vertical section. Fig. 3 is a longitudinal section, showing the cap and part of the wheel.

O is a metallic wheel revolving upon an axis set intoapillow-block of ordinary construction.

The buckets'C have two faces, one of which is. set radially to the wheel or slightly inclined toward the point of induction when receiving the jet of steam.

The cap B has the curve of the periphery of the whr .1. On the lower'sidc of the cap are the grooves F F, Fig. 3. These grooves run the entire length of the cap, and receive the rims of the wheel 0, which project a little beyond the points made by the junction of the faces of adjoining buckets. In these grooves are fitted thin strips of elasticmetal, which are kept in contact with the edges of the rims of the wheel by means of the set-screws D D, making a packing to prevent the lateral escape of the steam.

The steam is admitted through the induction-pipe A, passing through an orifice in the cap B, having such a direction as that the jet of steam shall fall upon the radially-disposed faces ot the bucket, and drive the wheel for ward, the steam being set free when thebucket has passed beyond the end of the cap.

The capB is supported upon rodsEE, which rest upon the frame supporting the pillowblocks, and which, by means of nuts working upon screws on their upper ends, hold the cap firmly in place against the pressure of the steam.

The-ends ofthe cap B are closed by the adjustable plates G, which, by means of the slots and set-screws g g, fit against the wheel 0, so

as to prevent the escape andwaste of the steam.

Havingfully explained the construction and operation of myimprovcd rotary steam-engine, what I claim as my invention, and seek to secure by Letters Patent, is

1. The construction of the cap B, with the grooves F, metallic packing, and set-screws D D, substantially as and for the purposes set forth.

' 2. The combination of the cap B and adjustable end plates, G, substantially as and for the purposes set forth.

3. The combination of the cap B and wheel 0, constructed substantially as and for the purposes set forth.

In testimony whereof Ihave signed my name to this specification, in the presence of two subscribing witnesses.

' GEO. A. LAMB.

Witnesses:

1t. MASON, L. MURPHY. 

